Used for the bulk treatment of small parts or pipes (up to several meters long), the closed cleaning system operates in two ways: first, the parts are washed by flooding the cleaning chamber, and second by vapor degreasing in the same chamber. A typical machine is shown below.
The machines are equipped with a side or top entry/exit, together with protected loading/unloading zones. Additionally, the virtually closed loop operation ensures the optimum re-use of solvents.
Cleaning Process Description
As an option, the equipment can be operated under a vacuum thus lowering the distillation temperatures and allowing permanent control of the vapor emissions from the cleaning machine.
The cleaning machines operate with virtually no emissions and thus respect the health and safety of workers.
This ensures optimum usage of the solvent and also reduces the quantity of waste sent to external treatment companies. It is a modern and economical cleaning process combined with an active contribution to the protection of the environment and safeguard of people's well-being.
"In an open cleaning machine, an average use of 7.9 tons of product per year results in up to 5.8 tons of losses through emissions. The remaining 2.1 tons of solvent are collected as used solvent and are sent to specialized companies for waste treatment and recycling."
"For the same volume to be cleaned by a closed system, only 2.35 tons per year is used. Of these 2.35 tons, only 0.14 tons are emitted into the air. The remaining amount of solvent is collected as used solvent and is sent to specialist waste treatment companies and recycling companies to be processed."
The report, on the reduction of emissions of perchloroethylene according to the VOC Directive (1999/13/CE) (30 April 2001), was prepared by the ECSA for the UK Environment Agency.
On request, our specialists from SAFECHEM can organize cleaning trials at OEM sites to determine the best technical and economical cleaning solution to meet the individual customer's needs.
The quality of the solvent and continued maintenance of the product for closed cleaning equipment are of paramount importance. Dow has successfully supplied the leading OEMs with chemical know-how, and assisted in their development of cleaning technology for over 40 years.
For detailed information on closed cleaning equipment please contact one of our partner cleaning machine manufacturers.